Ok I have been in love with a girl over a decade, v separated a couple of times , then got back together.. in between v both had relationship with other people. But still I can't leave her nor can she... n I really do llove her no one else can fill her space.. she has boyfriend nw and don't know why I am not liking that, but she still says she love me a lot.. don't know hw this going to end.. smtimes it gets in to ma head.. please help.

You are not in a healthy relationship and you don't move on because of for some reason enjoy the pain you know she will give. She does not "love" you if she is dating someone else, she is using you for her own reasons.

If you can't leave her, then put up with it, knowing what she is doing with him and coming back to you when she wants to.

If you want to leave her get counseling if you are too weak willed to do it on your own.

I would recommend leaving her. Why be with someone that doesn't respect how you feel about her, or to someone who you mean nothing to?

She is cheating on you, and cheating on her boyfriend, what is the point?

Move on, go no contact, and find someone who is going to be with you, not with the whole block.